thirdparty/jsdoctoolkit/app/lib/JSDOC/TokenReader.js
changeset 3041 c8f47f0b6697
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/thirdparty/jsdoctoolkit/app/lib/JSDOC/TokenReader.js	Sun Oct 25 19:15:44 2009 +0000
@@ -0,0 +1,332 @@
+if (typeof JSDOC == "undefined") JSDOC = {};
+
+/**
+	@class Search a {@link JSDOC.TextStream} for language tokens.
+*/
+JSDOC.TokenReader = function() {
+	this.keepDocs = true;
+	this.keepWhite = false;
+	this.keepComments = false;
+}
+
+/**
+	@type {JSDOC.Token[]}
+ */
+JSDOC.TokenReader.prototype.tokenize = function(/**JSDOC.TextStream*/stream) {
+	var tokens = [];
+	/**@ignore*/ tokens.last    = function() { return tokens[tokens.length-1]; }
+	/**@ignore*/ tokens.lastSym = function() {
+		for (var i = tokens.length-1; i >= 0; i--) {
+			if (!(tokens[i].is("WHIT") || tokens[i].is("COMM"))) return tokens[i];
+		}
+	}
+
+	while (!stream.look().eof) {
+		if (this.read_mlcomment(stream, tokens)) continue;
+		if (this.read_slcomment(stream, tokens)) continue;
+		if (this.read_dbquote(stream, tokens))   continue;
+		if (this.read_snquote(stream, tokens))   continue;
+		if (this.read_regx(stream, tokens))      continue;
+		if (this.read_numb(stream, tokens))      continue;
+		if (this.read_punc(stream, tokens))      continue;
+		if (this.read_newline(stream, tokens))   continue;
+		if (this.read_space(stream, tokens))     continue;
+		if (this.read_word(stream, tokens))      continue;
+		
+		// if execution reaches here then an error has happened
+		tokens.push(new JSDOC.Token(stream.next(), "TOKN", "UNKNOWN_TOKEN"));
+	}
+	return tokens;
+}
+
+/**
+	@returns {Boolean} Was the token found?
+ */
+JSDOC.TokenReader.prototype.read_word = function(/**JSDOC.TokenStream*/stream, tokens) {
+	var found = "";
+	while (!stream.look().eof && JSDOC.Lang.isWordChar(stream.look())) {
+		found += stream.next();
+	}
+	
+	if (found === "") {
+		return false;
+	}
+	else {
+		var name;
+		if ((name = JSDOC.Lang.keyword(found))) tokens.push(new JSDOC.Token(found, "KEYW", name));
+		else tokens.push(new JSDOC.Token(found, "NAME", "NAME"));
+		return true;
+	}
+}
+
+/**
+	@returns {Boolean} Was the token found?
+ */
+JSDOC.TokenReader.prototype.read_punc = function(/**JSDOC.TokenStream*/stream, tokens) {
+	var found = "";
+	var name;
+	while (!stream.look().eof && JSDOC.Lang.punc(found+stream.look())) {
+		found += stream.next();
+	}
+	
+	if (found === "") {
+		return false;
+	}
+	else {
+		tokens.push(new JSDOC.Token(found, "PUNC", JSDOC.Lang.punc(found)));
+		return true;
+	}
+}
+
+/**
+	@returns {Boolean} Was the token found?
+ */
+JSDOC.TokenReader.prototype.read_space = function(/**JSDOC.TokenStream*/stream, tokens) {
+	var found = "";
+	
+	while (!stream.look().eof && JSDOC.Lang.isSpace(stream.look())) {
+		found += stream.next();
+	}
+	
+	if (found === "") {
+		return false;
+	}
+	else {
+		if (this.collapseWhite) found = " ";
+		if (this.keepWhite) tokens.push(new JSDOC.Token(found, "WHIT", "SPACE"));
+		return true;
+	}
+}
+
+/**
+	@returns {Boolean} Was the token found?
+ */
+JSDOC.TokenReader.prototype.read_newline = function(/**JSDOC.TokenStream*/stream, tokens) {
+	var found = "";
+	
+	while (!stream.look().eof && JSDOC.Lang.isNewline(stream.look())) {
+		found += stream.next();
+	}
+	
+	if (found === "") {
+		return false;
+	}
+	else {
+		if (this.collapseWhite) found = "\n";
+		if (this.keepWhite) tokens.push(new JSDOC.Token(found, "WHIT", "NEWLINE"));
+		return true;
+	}
+}
+
+/**
+	@returns {Boolean} Was the token found?
+ */
+JSDOC.TokenReader.prototype.read_mlcomment = function(/**JSDOC.TokenStream*/stream, tokens) {
+	if (stream.look() == "/" && stream.look(1) == "*") {
+		var found = stream.next(2);
+		
+		while (!stream.look().eof && !(stream.look(-1) == "/" && stream.look(-2) == "*")) {
+			found += stream.next();
+		}
+		
+		// to start doclet we allow /** or /*** but not /**/ or /****
+		if (/^\/\*\*([^\/]|\*[^*])/.test(found) && this.keepDocs) tokens.push(new JSDOC.Token(found, "COMM", "JSDOC"));
+		else if (this.keepComments) tokens.push(new JSDOC.Token(found, "COMM", "MULTI_LINE_COMM"));
+		return true;
+	}
+	return false;
+}
+
+/**
+	@returns {Boolean} Was the token found?
+ */
+JSDOC.TokenReader.prototype.read_slcomment = function(/**JSDOC.TokenStream*/stream, tokens) {
+	var found;
+	if (
+		(stream.look() == "/" && stream.look(1) == "/" && (found=stream.next(2)))
+		|| 
+		(stream.look() == "<" && stream.look(1) == "!" && stream.look(2) == "-" && stream.look(3) == "-" && (found=stream.next(4)))
+	) {
+		
+		while (!stream.look().eof && !JSDOC.Lang.isNewline(stream.look())) {
+			found += stream.next();
+		}
+		
+		if (this.keepComments) {
+			tokens.push(new JSDOC.Token(found, "COMM", "SINGLE_LINE_COMM"));
+		}
+		return true;
+	}
+	return false;
+}
+
+/**
+	@returns {Boolean} Was the token found?
+ */
+JSDOC.TokenReader.prototype.read_dbquote = function(/**JSDOC.TokenStream*/stream, tokens) {
+	if (stream.look() == "\"") {
+		// find terminator
+		var string = stream.next();
+		
+		while (!stream.look().eof) {
+			if (stream.look() == "\\") {
+				if (JSDOC.Lang.isNewline(stream.look(1))) {
+					do {
+						stream.next();
+					} while (!stream.look().eof && JSDOC.Lang.isNewline(stream.look()));
+					string += "\\\n";
+				}
+				else {
+					string += stream.next(2);
+				}
+			}
+			else if (stream.look() == "\"") {
+				string += stream.next();
+				tokens.push(new JSDOC.Token(string, "STRN", "DOUBLE_QUOTE"));
+				return true;
+			}
+			else {
+				string += stream.next();
+			}
+		}
+	}
+	return false; // error! unterminated string
+}
+
+/**
+	@returns {Boolean} Was the token found?
+ */
+JSDOC.TokenReader.prototype.read_snquote = function(/**JSDOC.TokenStream*/stream, tokens) {
+	if (stream.look() == "'") {
+		// find terminator
+		var string = stream.next();
+		
+		while (!stream.look().eof) {
+			if (stream.look() == "\\") { // escape sequence
+				string += stream.next(2);
+			}
+			else if (stream.look() == "'") {
+				string += stream.next();
+				tokens.push(new JSDOC.Token(string, "STRN", "SINGLE_QUOTE"));
+				return true;
+			}
+			else {
+				string += stream.next();
+			}
+		}
+	}
+	return false; // error! unterminated string
+}
+
+/**
+	@returns {Boolean} Was the token found?
+ */
+JSDOC.TokenReader.prototype.read_numb = function(/**JSDOC.TokenStream*/stream, tokens) {
+	if (stream.look() === "0" && stream.look(1) == "x") {
+		return this.read_hex(stream, tokens);
+	}
+	
+	var found = "";
+	
+	while (!stream.look().eof && JSDOC.Lang.isNumber(found+stream.look())){
+		found += stream.next();
+	}
+	
+	if (found === "") {
+		return false;
+	}
+	else {
+		if (/^0[0-7]/.test(found)) tokens.push(new JSDOC.Token(found, "NUMB", "OCTAL"));
+		else tokens.push(new JSDOC.Token(found, "NUMB", "DECIMAL"));
+		return true;
+	}
+}
+/*t:
+	requires("../lib/JSDOC/TextStream.js");
+	requires("../lib/JSDOC/Token.js");
+	requires("../lib/JSDOC/Lang.js");
+	
+	plan(3, "testing JSDOC.TokenReader.prototype.read_numb");
+	
+	//// setup
+	var src = "function foo(num){while (num+8.0 >= 0x20 && num < 0777){}}";
+	var tr = new JSDOC.TokenReader();
+	var tokens = tr.tokenize(new JSDOC.TextStream(src));
+	
+	var hexToken, octToken, decToken;
+	for (var i = 0; i < tokens.length; i++) {
+		if (tokens[i].name == "HEX_DEC") hexToken = tokens[i];
+		if (tokens[i].name == "OCTAL") octToken = tokens[i];
+		if (tokens[i].name == "DECIMAL") decToken = tokens[i];
+	}
+	////
+	
+	is(decToken.data, "8.0", "decimal number is found in source.");
+	is(hexToken.data, "0x20", "hexdec number is found in source (issue #99).");
+	is(octToken.data, "0777", "octal number is found in source.");
+*/
+
+/**
+	@returns {Boolean} Was the token found?
+ */
+JSDOC.TokenReader.prototype.read_hex = function(/**JSDOC.TokenStream*/stream, tokens) {
+	var found = stream.next(2);
+	
+	while (!stream.look().eof) {
+		if (JSDOC.Lang.isHexDec(found) && !JSDOC.Lang.isHexDec(found+stream.look())) { // done
+			tokens.push(new JSDOC.Token(found, "NUMB", "HEX_DEC"));
+			return true;
+		}
+		else {
+			found += stream.next();
+		}
+	}
+	return false;
+}
+
+/**
+	@returns {Boolean} Was the token found?
+ */
+JSDOC.TokenReader.prototype.read_regx = function(/**JSDOC.TokenStream*/stream, tokens) {
+	var last;
+	if (
+		stream.look() == "/"
+		&& 
+		(
+			
+			(
+				!(last = tokens.lastSym()) // there is no last, the regex is the first symbol
+				|| 
+				(
+					   !last.is("NUMB")
+					&& !last.is("NAME")
+					&& !last.is("RIGHT_PAREN")
+					&& !last.is("RIGHT_BRACKET")
+				)
+			)
+		)
+	) {
+		var regex = stream.next();
+		
+		while (!stream.look().eof) {
+			if (stream.look() == "\\") { // escape sequence
+				regex += stream.next(2);
+			}
+			else if (stream.look() == "/") {
+				regex += stream.next();
+				
+				while (/[gmi]/.test(stream.look())) {
+					regex += stream.next();
+				}
+				
+				tokens.push(new JSDOC.Token(regex, "REGX", "REGX"));
+				return true;
+			}
+			else {
+				regex += stream.next();
+			}
+		}
+		// error: unterminated regex
+	}
+	return false;
+}